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Equipment Repairs => PLASMA TV forum => Topic started by: mzone on January 31, 2011,00:46:46

Title: samsung ps42c7hd clicking.
Post by: mzone on January 31, 2011,00:46:46

hi, i have a samsung ps42c7hd plasma with a fault which shows itself as the set not powering up and a relay clicking in the psu every 2-3 seconds.

clicking will stop if i disconnect control board however i replaced control board but same problem.

i have also noticed with no boards attached to power supply theres va voltage but no vs voltage upon switch on.

any ideas?

Title: Re: samsung ps42c7hd clicking.
Post by: terleckim on April 18, 2014,16:48:17

Quote from: mzone on January 31, 2011,00:46:46

hi, i have a samsung ps42c7hd plasma with a fault which shows itself as the set not powering up and a relay clicking in the psu every 2-3 seconds.

clicking will stop if i disconnect control board however i replaced control board but same problem.

i have also noticed with no boards attached to power supply theres va voltage but no vs voltage upon switch on.

any ideas?

Title: Re: samsung ps42c7hd clicking.
Post by: downunder on April 18, 2014,20:46:22

There will be no Vs while the control board is disconnected.....it supplies 5V to the VS-ON pin of the power supply to activate Vs output. Was it a good control board you put in?  Do the PSU relays still click repeatedly if you only remove the heavy duty plug from PSU to Y-Main? If Y and Z board heatsinks remain cold with everything connected,
suspect the Y-Main. Are you able to activate the onboard test patterns. See attachment.
I do believe that Turnip is a superhero on these.

Title: Re: samsung ps42c7hd clicking.
Post by: Turnip on April 19, 2014,12:23:04

Hi Bruce,

Not at all, just had secondary rectifier dries which are natural considering the age of the set.

Guess you're pulling my lariat, as ever, but it's pretty good - Chris.